[ScottyM]

Re: Blomberg 1501AAA PCB damage

Result: My mum is happy!

All the electronics seem to be OK. I ran a couple of cold quick washes which completed successfully, so now it is running a full-cycle 90-degree maintenance wash.

Thanks,

Scotty M.

[ScottyM]

Re: Blomberg 1501AAA PCB damage

I’m expecting the new door interlock arriving today, as it was sent out yesterday.
In the meantime, I removed the old door interlock and examined it.
There is no trace of water leakage anywhere inside the machine.
The interlock had a rubber cover over it, again there were no sign of water dripping onto it.

However, I decided to break open the old interlock and found that the PTC element had broken down, tracking across at mains voltage.

Also, I found that in addition to the damaged PCB tracks, 3 zener diodes had failed short-circuit.
These were:
GR26, type ZY10GP (10V, 2W). I used 1N5437B (10V, 5W) to replace it.
GR28 & GR29, type BZV47C12 (12V, 2W). I used 1N5439B (12V, 5W) to replace them.

Hopefully the controller IC hasn’t been damaged in the process.

If it actually works after all this, I’m considering replacing link wire 5 (between the function switch and camswitch) with a small-value fuse, something like 315mA, to prevent future fry-ups.

Scotty M.

Edit: The postman just delivered my mail at 17:05!

[ScottyM]

Re: Blomberg 1501AAA PCB damage

Many thanks!

I’ve ordered one from your shop.

Scotty 🙂

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